关于腹部摄片注意事项的叙述，错误的是（） A.摄片前均须清洁肠道 B.除新生儿外，均

以下不属于采用截流式合流制排水系统的城市雨水系统的组成的是（）

A.雨水口

B.检查井

C.溢流井

D.雨水泵站

把命题“对顶角相等”改写成“如果……，那么……”的形式:____________.

控制就是以计划为标准，由管理者对被管理者的行为和活动实施管理的过程，其内容包含()

A．协调、监督、分析反馈、调整

B．检查、协调、分析反馈、调整

C．检查、监督、协调、调整

D．检查、监督、分析反馈、调整

E．检查、监督、分析反馈、协调、调整

Big Cheese Chairs (BCC) manufactures and sells executive leather chairs. They are considering a new design of massaging chair to launch into the competitive market in which they operate.They have carried out an investigation in the market and using a target costing system have targeted a competitive selling price of $120 for the chair. BCC wants a margin on selling price of 20% (ignoring any overheads).The frame and massage mechanism will be bought in for $51 per chair and BCC will upholster it in leather and assemble it ready for despatch.Leather costs $10 per metre and two metres are needed for a complete chair although 20% of all leather is wasted in the upholstery process.The upholstery and assembly process will be subject to a learning effect as the workers get used to the new design. BCC estimates that the first chair will take two hours to prepare but this will be subject to a learning rate (LR) of 95%. The learning improvement will stop once 128 chairs have been made and the time for the 128th chair will be the time for all subsequent chairs. The cost of labour is $15 per hour.The learning formula is shown on the formula sheet and at the 95% learning rate the value of b is –0·074000581.Required:

(b) Assuming that a cost gap for the chair exists suggest four ways in which it could be closed. (6 marks)The production manager denies any claims that a cost gap exists and has stated that the cost of the 128th chair will be low enough to yield the required margin.

患者女性，35岁，反复发作心悸3年，突发突止，每次发作无明显诱因，持续时间多为数分钟，体格检查未见异常。最可能的诊断是

A．室性心动过速
B．室内差异性传导
C．心房颤动伴室性心动过速
D．阵发性室上性心动过速
E．窦性心动过速